Run exception handlers on SIGTERM in daml assistant (#2069)

.hlint.yaml

@@ -83,7 +83,7 @@
     - DA.Sdk.Cli.System
     - DA.Sdk.Cli.Version
     - DAML.Assistant.Install.Path
-    - DamlHelper.Signals
+    - DA.Signals
     - Development.IDE.Core.Compile
     - Development.IDE.GHC.Compat
   - {name: ImplicitParams, within: []}

daml-assistant/daml-helper/BUILD.bazel

@@ -3,7 +3,6 @@
 
 load("//bazel_tools:haskell.bzl", "da_haskell_binary", "da_haskell_library", "da_haskell_test")
 load("//bazel_tools/packaging:packaging.bzl", "package_app")
-load("@os_info//:os_info.bzl", "is_windows")
 
 da_haskell_library(
     name = "daml-helper-lib",
@@ -29,7 +28,7 @@ da_haskell_library(
         "safe-exceptions",
         "text",
         "yaml",
-    ] + ([] if is_windows else ["unix"]),
+    ],
     visibility = ["//visibility:public"],
     deps = [
         "//daml-assistant:daml-project-config",

daml-assistant/daml-helper/src/DamlHelper/Main.hs

@@ -9,8 +9,8 @@ import System.Environment
 import System.Exit
 import System.IO
 
+import DA.Signals
 import DamlHelper.Run
-import DamlHelper.Signals
 
 main :: IO ()
 main =

daml-assistant/exe/DAML/Assistant.hs

@@ -7,6 +7,7 @@ module DAML.Assistant
     ( main
     ) where
 
+import DA.Signals
 import DAML.Project.Config
 import DAML.Assistant.Types
 import DAML.Assistant.Env
@@ -30,6 +31,7 @@ import Safe
 -- | Run the assistant and exit.
 main :: IO ()
 main = displayErrors $ do
+    installSignalHandlers
     builtinCommandM <- tryBuiltinCommand
     case builtinCommandM of
         Just builtinCommand -> do

dev-env/bin/daml-sdk-head

@@ -88,7 +88,7 @@ fi
 
 cat > $DAML_HOME/bin/daml-head << EOF
 #!/bin/bash
-DAML_SDK_VERSION=0.0.0 $DAML_HEAD_SDK/daml/daml "\$@"
+exec env DAML_SDK_VERSION=0.0.0 $DAML_HEAD_SDK/daml/daml "\$@"
 EOF
 chmod +x $DAML_HOME/bin/daml-head
 

libs-haskell/da-hs-base/BUILD.bazel

@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 load("//bazel_tools:haskell.bzl", "da_haskell_library", "da_haskell_test")
+load("@os_info//:os_info.bzl", "is_windows")
 
 da_haskell_library(
     name = "da-hs-base",
@@ -50,7 +51,7 @@ da_haskell_library(
         "utf8-string",
         "uuid",
         "vector",
-    ],
+    ] + ([] if is_windows else ["unix"]),
     src_strip_prefix = "src",
     visibility = ["//visibility:public"],
     deps = [

libs-haskell/da-hs-base/src/DA/Signals.hs

@@ -4,7 +4,7 @@
 {-# LANGUAGE CPP #-}
 
 -- | Module that turns SIGTERM into a UserInterrupt exception in Unix.
-module DamlHelper.Signals
+module DA.Signals
     ( installSignalHandlers
     ) where
 
@@ -25,4 +25,3 @@ installSignalHandlers = do
     mainThread <- myThreadId
     void $ installHandler sigTERM (Catch $ throwTo mainThread UserInterrupt) Nothing
 #endif
-

unreleased.rst

@@ -11,3 +11,5 @@ HEAD — ongoing
 
 - [daml assistant] Fix VSCode path for use if not already in PATH on mac
 - [DAML-LF] Fixed regression that produced an invalid daml-lf-archive artefact. See `#2058 <https://github.com/digital-asset/daml/issues/2058>`__.
+- [daml assistant] Kill child processes on ``SIGTERM``. This means that killing
+  ``daml sandbox`` will also kill the sandbox process.